JP2008525733A5 - - Google Patents

Claims (16)

A method of filling a pressurized gas cylinder, wherein the filling is represented by a parameter using a prescribed value of the filling rate, such as a derivative as a function of time of injection pressure in the cylinder, and the filling is performed in the cylinder. The filling pressure is interrupted when the filling pressure reaches a maximum filling pressure calculated according to the filling rate, and the maximum filling pressure in the cylinder is Conditions, nominal filling capacity , i.e. the amount of gas that can be stored in a given cylinder in the form of nominal pressure at nominal temperature, or cylinder design temperature , i.e. the maximum temperature that can be reached in the cylinder in use A method characterized by being calculated to fit the more severe of the.   The method of claim 1, wherein the maximum pressure is calculated as a function of ambient temperature and initial pressure in the cylinder.   The method according to claim 2, wherein the ambient temperature and the initial temperature in the cylinder are measured before filling. The method according to any one of claims 1 to 3, wherein the filling rate, wherein the is selected according to it and / or the desired filling time according to the desired packing ratio. 5. A method according to claim 4 , characterized in that the filling rate is selected according to the ambient temperature and the initial pressure of the gas in the cylinder measured before filling. The method according to any one of claims 1 to 5, wherein the filling rate is expressed as the derivative as a function of time of the injection pressure in said cylinder, 0.05 bar / s to 20 Bar / sec, preferably 0.10 to 15 bar / sec, more preferably 0.5 bar / sec to 12 bar / sec. The method as claimed in any one of claims 1 to 6, wherein the filling rate, that is an operator or by automatic selection at the time of filling. The method according to any one of claims 1 to 7, wherein the filling method of being controlled using only the injection pressure in the cylinder. A method according to any one of claims 1 to 8, the filling of the cylinder, the initial pressure, characterized in that it is performed at a temperature which is calculated as a function of the ambient temperature and the maximum filling pressure And how to. 10. A method as claimed in claim 9 , wherein the filling temperature is calculated as a function of the filling rate. 11. A method as claimed in claim 10 , wherein the maximum filling pressure is calculated as a function of the initial pressure, the ambient temperature, the temperature of the gas at the inlet of the cylinder, and the filling rate. . 12. A method according to any one of claims 9 to 11 , characterized in that the calculated filling temperature is less than the ambient temperature. 13. The method according to any one of claims 1 to 12 , wherein the cylinder has a ratio L / D of a length L to a diameter D of less than 6, preferably 1 to 5, more preferably 1. A method characterized in that the shape is substantially cylindrical. 14. The method according to any one of claims 1 to 13 , wherein the maximum filling pressure (Pf _{100% mass} ) corresponding to a condition corresponding to the nominal filling capacity of the cylinder is an equation:

Where, where
Tamb is the ambient temperature expressed in K;
-V is the filling speed of the cylinder in bar / second;
-P0 is the initial pressure expressed in bar, (P0, 15 ° C) is the initial pressure expressed in bar adjusted to 15 ° C,
A, b, c and d are coefficients obtained by regression. 15. The method according to any one of claims 1 to 14 , wherein the maximum filling pressure (Pf _{100% mass} ) corresponding to a condition corresponding to the nominal filling capacity of the cylinder is an equation:

Where, where
Tamb is the ambient temperature expressed in K;
-Tr is the temperature of the filling gas expressed in K;
-V is the filling speed of the cylinder in bar / second;
-P0 is the initial pressure expressed in bar, (P0, 15 ° C) is the initial pressure expressed in bar adjusted to 15 ° C,
A, b, c, d, e, f and g are coefficients obtained by regression. The method according to any one of claims 1 to 15 , wherein the maximum filling pressure (Pf _{85 ° C} ) corresponding to a condition corresponding to the cylinder design temperature is a polynomial:

Where, where
-P0 is the initial pressure in bar,
-N is an integer greater than or equal to 3,
-Coefficients AA, BB, CC. . . , ZZ is specific to the cylinder to be filled and is a polynomial function of the filling rate obtained by regression.